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<a href="_pgm_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">//===========================================================================</span><span class="comment"></span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">/*!</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> * </span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> *</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * \brief       Importing and exporting PGM images</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * </span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * </span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> * \author      C. Igel</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> * \date        2011</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> *</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> *</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * \par Copyright 1995-2017 Shark Development Team</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * </span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * &lt;BR&gt;&lt;HR&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * This file is part of Shark.</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"> * &lt;https://shark-ml.github.io/Shark/&gt;</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment"> * </span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"> * Shark is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment"> * it under the terms of the GNU Lesser General Public License as published </span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"> * by the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment"> * (at your option) any later version.</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment"> * </span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> * Shark is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment"> * GNU Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="comment"> * </span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="comment"> * You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="comment"> * along with Shark.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment"> *</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span><span class="comment"> */</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="comment">//===========================================================================</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="preprocessor">#ifndef SHARK_DATA_IMPORT_PGM_H</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="preprocessor">#define SHARK_DATA_IMPORT_PGM_H</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="preprocessor">#include &lt;fstream&gt;</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="preprocessor">#include &lt;boost/format.hpp&gt;</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="preprocessor">#include &lt;boost/filesystem.hpp&gt;</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="preprocessor">#include &lt;boost/archive/text_oarchive.hpp&gt;</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="preprocessor">#include &lt;<a class="code" href="_base_8h.html">shark/LinAlg/Base.h</a>&gt;</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="preprocessor">#include &lt;<a class="code" href="_dataset_8h.html">shark/Data/Dataset.h</a>&gt;</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceshark.html" title="AbstractMultiObjectiveOptimizer.">shark</a> {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment"></span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment">/**</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment"> * \addtogroup shark_globals</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment"> * @{</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment"> */</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="keyword">namespace </span>detail {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="keywordtype">void</span> importPGM( std::string <span class="keyword">const</span>&amp; fileName, std::vector&lt;unsigned char&gt;&amp; ppData, std::size_t&amp; sx, std::size_t&amp; sy )</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>{</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    std::ifstream file(fileName.c_str(), std::ios::binary);</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(file, <span class="stringliteral">&quot;Can not open File&quot;</span>);</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    </div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    std::string id;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>    std::size_t nGrayValues = 0;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>    file&gt;&gt; id;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(<span class="keywordtype">id</span> == <span class="stringliteral">&quot;P5&quot;</span> , <span class="stringliteral">&quot;File &quot;</span> + fileName+ <span class="stringliteral">&quot;is not a pgm&quot;</span>);</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>    <span class="comment">//ignore comments</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>    file &gt;&gt; std::ws;<span class="comment">//skip white space</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>    <span class="keywordflow">while</span>(file.peek() == <span class="charliteral">&#39;#&#39;</span>){</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>        file.ignore(std::numeric_limits&lt;std::streamsize&gt;::max(), <span class="charliteral">&#39;\n&#39;</span>);</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>    }</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>    file &gt;&gt; sx &gt;&gt; sy &gt;&gt; nGrayValues;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(file, <span class="stringliteral">&quot;Error reading file!&quot;</span>);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(nGrayValues &lt;= 255, <span class="stringliteral">&quot;File &quot;</span> + fileName+ <span class="stringliteral">&quot;unsupported format&quot;</span>);</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>    </div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>    ppData.resize(sx*sy);</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>    file.read((<span class="keywordtype">char</span>*)ppData.data(),sx*sy);</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(file, <span class="stringliteral">&quot;Error reading file!&quot;</span>);</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>}</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment"></span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span><span class="comment">/// \brief Writes a PGM file.</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="comment">///</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span><span class="comment">/// \param  fileName   File to write to</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="comment">/// \param  pData      unsigned char pointer to the data</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span><span class="comment">/// \param  sx         Width of image</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span><span class="comment">/// \param  sy         Height of image</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="comment"></span><span class="keywordtype">void</span> writePGM( std::string <span class="keyword">const</span>&amp; fileName, std::vector&lt;unsigned char&gt; <span class="keyword">const</span>&amp; data, std::size_t sx, std::size_t sy )</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>{</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>    std::ofstream file(fileName.c_str(), std::ios::binary);</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>    <a class="code hl_define" href="_exception_8h.html#adce1f80097c69010f5eab2618fa2e971">SHARK_RUNTIME_CHECK</a>(file, <span class="stringliteral">&quot;Can not open File&quot;</span>);</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>    file&lt;&lt;<span class="stringliteral">&quot;P5\n&quot;</span>&lt;&lt;sx&lt;&lt;<span class="stringliteral">&quot; &quot;</span>&lt;&lt;sy&lt;&lt;<span class="stringliteral">&quot;\n&quot;</span>&lt;&lt;255&lt;&lt;<span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>    file.write((<span class="keywordtype">char</span>*)data.data(),sx*sy);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>}</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>} <span class="comment">// end namespace detail</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span><span class="comment"></span> </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span><span class="comment">/// \brief Import a PGM image from file</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment">///</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="comment">/// \param  fileName   The file to read from</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment">/// \param  data       Linear object for storing image </span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span><span class="comment">/// \param  sx         Width of imported image</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span><span class="comment">/// \param  sy         Height of imported image</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;</div>
<div class="foldopen" id="foldopen00102" data-start="{" data-end="}">
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"><a class="line" href="group__shark__globals.html#ga45ff5a792e6e1552e25bafc527a49825">  102</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group__shark__globals.html#ga45ff5a792e6e1552e25bafc527a49825" title="Import a PGM image from file.">importPGM</a>( std::string <span class="keyword">const</span>&amp; fileName, T&amp; data, std::size_t&amp; sx, std::size_t&amp; sy ) {</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>    std::vector&lt;unsigned char&gt; rawData;</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>    detail::importPGM(fileName, rawData, sx, sy);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>    data.resize(sx*sy);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>    std::copy(rawData.begin(), rawData.end(), data.begin());</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>}</div>
</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="comment"></span> </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span><span class="comment">/// \brief Export a PGM image to file</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="comment">///</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="comment">/// \param  fileName   File to write to</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="comment">/// \param  data       Linear object storing image </span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="comment">/// \param  sx         Width of image</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span><span class="comment">/// \param  sy         Height of image</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span><span class="comment">/// \param  normalize  Adjust values to [0,255], default false</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span><span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;</div>
<div class="foldopen" id="foldopen00117" data-start="{" data-end="}">
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"><a class="line" href="group__shark__globals.html#ga3dd3d34b531f41052cad2eb70198a092">  117</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group__shark__globals.html#ga3dd3d34b531f41052cad2eb70198a092" title="Export a PGM image to file.">exportPGM</a>(std::string <span class="keyword">const</span>&amp; fileName, T <span class="keyword">const</span>&amp; data, std::size_t sx, std::size_t sy, <span class="keywordtype">bool</span> normalize = <span class="keyword">false</span>) {</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>    <a class="code hl_define" href="_exception_8h.html#a42a6a50e4d06c00d60fbca5333f40768">SIZE_CHECK</a>(sx*sy == data.size());</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    std::vector&lt;unsigned char&gt; rawData(data.size());</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    <span class="keyword">typename</span> T::const_iterator it = data.begin();</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>    std::size_t i = 0;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>    <span class="keywordflow">if</span>(normalize) {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>        <span class="keywordtype">double</span> lb = *std::min_element(data.begin(),data.end());</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>        <span class="keywordtype">double</span> ub = *std::max_element(data.begin(), data.end());</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>        <span class="keywordflow">for</span>( it = data.begin() ; it != data.end(); ++it, ++i )</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>            rawData[i] = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)( (*it - lb) / (ub - lb) * 255 );</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>    } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>        <span class="keywordflow">for</span>( it = data.begin() ; it != data.end(); ++it, ++i )</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>            rawData[i] = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)( *it );</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>    }</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>    detail::writePGM(fileName, rawData, sx, sy);</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>}</div>
</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span><span class="comment"></span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="comment">/// \brief Exports a set of filters as a grid image</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span><span class="comment">///</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="comment">/// It is assumed that the filters each form a row in the filter-matrix.</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span><span class="comment">/// Moreover, the sizes of the filter images has to be given and it must gold width*height=W.size2().</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span><span class="comment">/// The filters a re printed on a single image as a grid. The grid will be close to square. And the</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span><span class="comment">/// image are separated by a black 1 pixel wide line. </span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment">/// The output will be normalized so that all images are on the same scale.</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span><span class="comment">/// \param  basename   File to write to. &quot;.pgm&quot; is appended to the filename</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span><span class="comment">/// \param  filters    Matrix storing the filters row by row</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span><span class="comment">/// \param  width      Width of the filter image</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span><span class="comment">/// \param  height     Height of th filter image</span></div>
<div class="foldopen" id="foldopen00145" data-start="{" data-end="}">
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"><a class="line" href="group__shark__globals.html#gae049ff21921b0cae7f75669c1a150a09">  145</a></span><span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="group__shark__globals.html#gae049ff21921b0cae7f75669c1a150a09" title="Exports a set of filters as a grid image.">exportFiltersToPGMGrid</a>(std::string <span class="keyword">const</span>&amp; basename, RealMatrix <span class="keyword">const</span>&amp; filters,std::size_t width, std::size_t height) {</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>    <a class="code hl_define" href="_exception_8h.html#a42a6a50e4d06c00d60fbca5333f40768">SIZE_CHECK</a>(filters.size2() == width*height);</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>    <span class="comment">//try to get a square image</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>    std::size_t gridX = std::size_t(std::sqrt(<span class="keywordtype">double</span>(filters.size1())));</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>    std::size_t gridY = gridX;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>    <span class="keywordflow">while</span>(gridX*gridY &lt; filters.size1()) ++gridX;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>    </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>    RealMatrix image((height+1)*gridY,(width+1)*gridX,min(filters));</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>    </div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>    <span class="keywordflow">for</span>(std::size_t filter = 0; filter != filters.size1(); ++filter){</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>        <span class="comment">//get grid position from filter</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>        std::size_t i = filter/gridX;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>        std::size_t j = filter%gridX;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>        std::size_t startY = (height+1)*i;</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>        std::size_t startX = (width+1)*j;</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>        <span class="comment">//copy images</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>        noalias(subrange(image,startY,startY+height,startX,startX+width)) = to_matrix(row(filters,filter),height,width);</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>    }</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>    <a class="code hl_function" href="group__shark__globals.html#ga3dd3d34b531f41052cad2eb70198a092" title="Export a PGM image to file.">exportPGM</a>(</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>        (basename+<span class="stringliteral">&quot;.pgm&quot;</span>).c_str(), </div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>        blas::adapt_vector((height+1)*gridY*(width+1)*gridX,&amp;image(0,0)),</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>        (width+1)*gridX, (height+1)*gridY,</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>        <span class="keyword">true</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>    );</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>}</div>
</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment"></span> </div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">/// \brief Exports a set of filters as a grid image</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">///</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="comment">/// It is assumed that the filters each form a row in the filter-matrix.</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span><span class="comment">/// Moreover, the sizes of the filter images has to be given and it must gold width*height=W.size2().</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="comment">/// The filters a re printed on a single image as a grid. The grid will be close to square. And the</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="comment">/// image are separated by a black 1 pixel wide line. </span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span><span class="comment">/// The output will be normalized so that all images are on the same scale.</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span><span class="comment">/// \param  basename   File to write to. &quot;.pgm&quot; is appended to the filename</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">/// \param  filters    Matrix storing the filters row by row</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">/// \param  width      Width of the filter image</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span><span class="comment">/// \param  height     Height of th filter image</span></div>
<div class="foldopen" id="foldopen00182" data-start="{" data-end="}">
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"><a class="line" href="group__shark__globals.html#gaf2bd14cfe0ae426e1dba04703f89a691">  182</a></span><span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="group__shark__globals.html#gae049ff21921b0cae7f75669c1a150a09" title="Exports a set of filters as a grid image.">exportFiltersToPGMGrid</a>(std::string <span class="keyword">const</span>&amp; basename, <a class="code hl_class" href="classshark_1_1_data.html" title="Data container.">Data&lt;RealVector&gt;</a> <span class="keyword">const</span>&amp; filters,std::size_t width, std::size_t height) {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>    <a class="code hl_define" href="_exception_8h.html#a42a6a50e4d06c00d60fbca5333f40768">SIZE_CHECK</a>(<a class="code hl_function" href="group__shark__globals.html#ga6231b46b09731352a3cac40709a9625f" title="Return the dimensionality of a dataset.">dataDimension</a>(filters) == width*height);</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>    <span class="comment">//try to get a square image</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>    std::size_t numFilters = filters.<a class="code hl_function" href="group__shark__globals.html#ga814e8b0028cc90dd2af69805e8f8a04d" title="Returns the total number of elements.">numberOfElements</a>();</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>    std::size_t gridX = std::size_t(std::sqrt(<span class="keywordtype">double</span>(numFilters)));</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>    std::size_t gridY = gridX;</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>    <span class="keywordflow">while</span>(gridX*gridY &lt; numFilters) ++gridX;</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>    </div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>    <span class="keywordtype">double</span> minimum = std::numeric_limits&lt;double&gt;::max();</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>    <span class="keywordflow">for</span>(std::size_t i = 0; i != filters.<a class="code hl_function" href="group__shark__globals.html#gabd82edf467b9b82f4b0a1e70fd695311" title="Returns the number of batches of the set.">numberOfBatches</a>(); ++i){</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>        minimum =std::min(minimum,min(filters.<a class="code hl_function" href="group__shark__globals.html#ga73034ee5639176b0d45e1059859d0f0a">batch</a>(i)));</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>    }</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>    </div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>    RealMatrix image((height+1)*gridY,(width+1)*gridX,minimum);</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>    </div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>    <span class="keywordflow">for</span>(std::size_t filter = 0; filter != numFilters; ++filter){</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>        <span class="comment">//get grid position from filter</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>        std::size_t i = filter/gridX;</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>        std::size_t j = filter%gridX;</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>        std::size_t startY = (height+1)*i;</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>        std::size_t startX = (width+1)*j;</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>        RealVector filterImage =filters.<a class="code hl_function" href="group__shark__globals.html#ga0ea72a74a21d5ff59772516b83c4a58b">element</a>(filter);</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>        <span class="comment">//copy images</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>        noalias(subrange(image,startY,startY+height,startX,startX+width)) = to_matrix(filterImage,height,width);</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>    }</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>    <a class="code hl_function" href="group__shark__globals.html#ga3dd3d34b531f41052cad2eb70198a092" title="Export a PGM image to file.">exportPGM</a>(</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>        (basename+<span class="stringliteral">&quot;.pgm&quot;</span>).c_str(), </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>        blas::adapt_vector((height+1)*gridY*(width+1)*gridX,&amp;image(0,0)),</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>        (width+1)*gridX, (height+1)*gridY,</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>        <span class="keyword">true</span>);</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>}</div>
</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span><span class="comment"></span> </div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span><span class="comment">/// \brief Import PGM images scanning a directory recursively</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="comment">///</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span><span class="comment">/// All images are required to have the same size. the shape of the images is stored in set.shape()</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span><span class="comment">///</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span><span class="comment">/// \param  p       Directory</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span><span class="comment">/// \param  set     Set storing images</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span><span class="comment"></span><span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;</div>
<div class="foldopen" id="foldopen00221" data-start="{" data-end="}">
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"><a class="line" href="group__shark__globals.html#gab96fa7c3a2939a73db2108bb6c41686a">  221</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group__shark__globals.html#gab96fa7c3a2939a73db2108bb6c41686a" title="Import PGM images scanning a directory recursively.">importPGMSet</a>(std::string <span class="keyword">const</span>&amp;p, <a class="code hl_class" href="classshark_1_1_data.html" title="Data container.">Data&lt;T&gt;</a> &amp;set){</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>    std::vector&lt;T&gt; container;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>    std::vector&lt;std::pair&lt;std::size_t,std::size_t&gt; &gt; info;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>    <span class="keywordflow">if</span> (boost::filesystem::is_directory(p)) {</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>        <span class="keywordflow">for</span> (boost::filesystem::recursive_directory_iterator itr(p); itr!=boost::filesystem::recursive_directory_iterator(); ++itr) {</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>            <span class="keywordflow">if</span> (boost::filesystem::is_regular(itr-&gt;status())) {</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>                <span class="keywordflow">if</span> ((boost::filesystem::extension(itr-&gt;path()) == <span class="stringliteral">&quot;.PGM&quot;</span>) ||</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>                    (boost::filesystem::extension(itr-&gt;path()) == <span class="stringliteral">&quot;.pgm&quot;</span>)) {</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>                    T img;</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>                    std::pair&lt;std::size_t,std::size_t&gt; imgInfo;</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>                    <a class="code hl_function" href="group__shark__globals.html#ga45ff5a792e6e1552e25bafc527a49825" title="Import a PGM image from file.">importPGM</a>(itr-&gt;path().string().c_str(), img, imgInfo.first, imgInfo.second);</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>                    container.push_back(img);</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>                    info.push_back(imgInfo);</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>                }</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>            }</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>        }</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>    } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>        <span class="keywordflow">throw</span>( std::invalid_argument( <span class="stringliteral">&quot;[importPGMDir] cannot open file&quot;</span> ) );</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>    }</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>    </div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>    <span class="comment">//check all images have same size</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>    <span class="keywordflow">for</span>(<span class="keyword">auto</span> <span class="keyword">const</span>&amp; i: info){</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>        <span class="keywordflow">if</span>(i.first != info.front().first || i.second != info.front().second){</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>            <span class="keywordflow">throw</span> <a class="code hl_define" href="_exception_8h.html#a4e03d7dfdfe8cbc90447fa829fc09e4f">SHARKEXCEPTION</a>(<span class="stringliteral">&quot;[importPGMSet] all images are required to have the same size&quot;</span>);</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>        }</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>    }</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>    set = <a class="code hl_function" href="group__shark__globals.html#ga1a1a4f4249f709e6169a601a9a857fa8" title="creates a data object from a range of elements">createDataFromRange</a>(container);</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>    set.<a class="code hl_function" href="group__shark__globals.html#gabdfa24d4e424c86cf39851c143b2dd37" title="Returns the shape of the elements in the dataset.">shape</a>() = {info.front().second,info.front().first};</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>}</div>
</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span><span class="comment"></span> </div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span><span class="comment">/** @}*/</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span> </div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>} <span class="comment">// end namespace shark</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="preprocessor">#endif</span></div>
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